Switching regulation circuit and dual-winding motor apparatus
AssigneeFeeling Technology Corp.
InventorsHsuan-Chuan Chen, Teng-Tsai Lin
Life of this patent
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Abstract
A switching regulation circuit for a dual-winding motor apparatus is provided. The switching regulation circuit comprises a gate-controlled device and a driving circuit. When one of the two windings generates an induced voltage signal greater than a threshold value, the driving circuit generates an output signal for turning on the gate-controlled transistor. Thereby, a parasitic diode of the gate-controlled device will not be turned on and damage the entire circuit.
Claims8
A switching regulation circuit for a dual-winding motor apparatus, the dual-winding motor apparatus comprising a first winding, a second winding and a supply rail, the first winding and the second winding being wound in adverse directions at a same position of the dual-winding motor apparatus, and alternately conducting a current, the dual-winding motor apparatus generating an induced voltage signal that represents an induced voltage of the second winding when the second winding has not yet conducted a current, the switching regulation circuit comprising:
- a gate-controlled device, having a gate, a drain and a source, the drain being coupled to the second winding, and the source being coupled to a ground end of the supply rail;
- and
- a driving circuit, comprising a negative-voltage comparator, the driving circuit being coupled to the gate and configured to detect the dual-winding motor apparatus with a rotational position of a rotor thereof to generate a detection signal, the negative-voltage comparator being configured to compare the induced voltage signal with a threshold value having a zero voltage level;
- wherein when the gate-controlled device has been turned off by the driving circuit in response to the detection signal, the negative-voltage comparator generates an output signal to turn on the gate-controlled device while the induced voltage signal is smaller than the zero voltage level.
A dual-winding motor apparatus, comprising:
- a rotor and a stator, in which the rotor rotates relatively to the stator;
- a first winding and a second winding being wound in adverse directions at a same position of the dual-winding motor apparatus, and alternatively conducting a current, the second winding generating an induced voltage signal when the first winding conducts current and the second winding has not yet conducted a current;
- a supply rail;
- a gate-controlled device, having a gate, a drain and a source, the drain being coupled to the second winding, and the source being coupled to a ground end of the supply rail;
- and
- a driving circuit, comprising a negative-voltage comparator, the driving circuit being coupled to the gate and configured to detect the dual-winding motor apparatus with a rotational position of a rotor thereof to generate a detection signal, the negative-voltage comparator being configured to compare the induced voltage signal with a threshold value having a zero voltage level;
- wherein when the gate-controlled device has been turned off by the driving circuit in response to the detection signal, the negative-voltage comparator generates an output signal to turn on the gate-controlled device while the induced voltage signal is smaller than the zero voltage level.
Dependencies are inferred from the claim text.